Republic Protocol is an open-source decentralized dark pool exchange. It facilitates cross-chain atomic trades on a hidden order book over the Ethereum and Bitcoin networks. Miners within the protocol run equation solving nodes to earn REN tokens and match orders without revealing the underlying trade until execution. This system creates a trustless trading system for large block orders enabling ERC20, Ethereum and Bitcoin pairs to be executed with minimal price slippage and provides protection from front-running.